Optional Function Parameters

Snippet

Function parameters can be marked as optional using the question mark syntax, allowing them to be omitted during calls.

snippet.ts
typescript
function greet(name: string, title?: string) {
  return "Hello " + (title ? title + " " : "") + name;
}

Breakdown

title?: string

The 'title' parameter is optional; its value will be undefined if not provided.

(title ? title + " " : "")

A ternary operator checks if title exists before using it in the string.

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